For Chrysler PT Cruiser 4" Slant Muffler Tip Catback Exhaust System Made of high quality T-304 stainless steel with clamp-on design TIG welded CNC machine flange for resistance against pressure and corrosion Aggressive deep and smooth tone sound while ensures smooth exhaust gas flow Dyno proven to instantly increases 15 to 25 horsepower or low end torque 4" slant muffler tip / 2.25" inlet / Removable silencer included / Instruction is NOT included